20565207920

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1\times {\mathrm{19429}}^1$

素因数の和:19674

約数の個数: 80

約数和(自身を含む): 48658626720

約数和(自身を除く): 28093418800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 131, 202, 262, 404, 505, 524, 655, 808, 1010, 1048, 1310, 1616, 2020, 2096, 2620, 4040, 5240, 8080, 10480, 13231, 19429, 26462, 38858, 52924, 66155, 77716, 97145, 105848, 132310, 155432, 194290, 211696, 264620, 310864, 388580, 529240, 777160, 1058480, 1554320, 1962329, 2545199, 3924658, 5090398, 7849316, 9811645, 10180796, 12725995, 15698632, 19623290, 20361592, 25451990, 31397264, 39246580, 40723184, 50903980, 78493160, 101807960, 156986320, 203615920, 257065099, 514130198, 1028260396, 1285325495, 2056520792, 2570650990, 4113041584, 5141301980, 10282603960, 20565207920]

約数ペア:

[(1, 20565207920), (2, 10282603960), (4, 5141301980), (5, 4113041584), (8, 2570650990), (10, 2056520792), (16, 1285325495), (20, 1028260396), (40, 514130198), (80, 257065099), (101, 203615920), (131, 156986320), (202, 101807960), (262, 78493160), (404, 50903980), (505, 40723184), (524, 39246580), (655, 31397264), (808, 25451990), (1010, 20361592), (1048, 19623290), (1310, 15698632), (1616, 12725995), (2020, 10180796), (2096, 9811645), (2620, 7849316), (4040, 5090398), (5240, 3924658), (8080, 2545199), (10480, 1962329), (13231, 1554320), (19429, 1058480), (26462, 777160), (38858, 529240), (52924, 388580), (66155, 310864), (77716, 264620), (97145, 211696), (105848, 194290), (132310, 155432)]